@misc{packroff_taxonomische_studien_1991, 
author={Packroff, G.,Wilbert, N.},
title={Taxonomische Studien ueber die Ciliatenfauna (Protozoa, Ciliophora) der Eifelmaare},
year={1991},
howpublished = {journal article},
note = {Online available at: \url{} (DOI). Packroff, G.; Wilbert, N.: Taxonomische Studien ueber die Ciliatenfauna (Protozoa, Ciliophora) der Eifelmaare. Archiv fuer Protistenkunde. 1991. vol. 140, 121-139.}}